Emile mertz



(No lkodeL} E. MERTZ.

FILTER.

No. 437,443. Patented Sept. 30, 1890.

INVENTOR: V

WITNESSES:

f9; 6% 5, v .dttorney' I I 8 UNITE l STATES PATENT Ol -Front;

EMILE MERTZ, OF BASLE, SWITZERLAND.

FILTER.

SPECIFICATION forming part of Letters Patent No. 437,443, datedSeptember 30, 1890.

Original application filed November 24, 1888, Serial No. 291,749.Divided end this application filed March 8, 1890. Serial No. 343,217.(116 model.) Patented in France ptem r 11, 1888, No. 192,906; in Belgium$eptember 17, 1888, No. 83,288;

in England September 21, 1888, No. 18,666,- in Italy December 6, 1888,N0. 24,147/471, and in Austria-Hungary fieptember 24, 1889, No. 14,001and No. 31,120.

To all whom it may concern.-

Be it known that I, EMILE MERTZ, a citizen of France, residing at Basle,Switzerland, have invented certain new and useful Improvements inFilters, of which the following is a specification.

The present invention is the subject of Letters Patent in foreigncountries as follows:

France, No. 192,906, dated September 11, 1888, and of certificate ofaddition thereto dated November 4, 1889; Belgium, No. 83,288, datedSeptember 17, 1888; Great Britain, No. 13,666, dated September 21, 1888;Italy, No. 24,147 471, dated December 6,1888, and Austria-Hungary, No.14,001 and No. 31,120, dated September 24, 1889.

The present invention relates to filters for filtering water underpressure; and it consists in the construction of the filter itself,which is composed of a casing having inlet and outlet openings,avertical discharge-tube extending within the casing and communicatingwith the outlet-opening, a perforated pipe which slips over saiddischarge-tube,wherebya sediment-chamber is formed between them, and anenvelope of fibrous material which surrounds said perforated tube.

The improved filters can be used for a variety of purposes, and theinvention is not limited to any particular purpose. They can be used inresidences for filtering the Water which is supplied for ordinaryhousehold uses, for purifying the water-supply of cities before it isintroduced into the supply-mains, in connection with apparatus formoistening the air in factories or elsewhere, and for any other purpose.It is necessary, however, that the water passing through the improvedfilters should be forced therethrough, and the nec-.

essary force may be applied either by suction or by pressure.

The construction and operation of the improved filters are illustratedin the accompanying drawings, wherein is shown a sectional elevation ofthe improved filter as the same is constructed when arranged in thesupplypipe of an air-moistening apparatus.

Referring first to the drawing, A is a perforated metallic tube havingnumerous holes or apertures a at extending through its walls,

and provided at or near one end with a fixed" fibrous material, such a,fel.t. '.lhese feltdisksorwashers'arepladedone above the other,surrounding the tube A and seating against the flange C until they coverall of the apertures a a of the tube. 'They are held closely andcompactly together, and retained in place on the perforated tube bymeans of a movable disk O',which screws onto the tube A. The perforatedtube Ais thus surrounded by an envelope of dense fibrous material suchas felt-which is retained on the tube between a fixed flange and aremovable disk. The perforated tube, with its inclosing-felts, islocated within a casing D, having screwed into it a centraldischarge-tube H, over which latter the perforated tubeAisslippedandonto which the perforated tube is screwed and so maintained in position.The open end of the casing D, through which the perforated tube isintroduced, is closed by a screw-threaded cap E.

. The water-supply pipe F enters the outer wall of the casing D andsupplies the water to the annular space within the casing exterior tothe felt washersB B. In order to pass out through the discharge-tube,the water must pass through the closely-felted fibers of the washers,whereby all impurities in the water are removed and only pure clearwater is discharged from the filter. The discharge-tube H extendsvertically within the perforated tube, reaching nearly to the upper partthere- -of, as shown, and its exterior diameter is somewhat less thanthe interior diameter of the perforated tube, so that an annular spaceis formed between the two tubes, which constitutes a sediment-chamber.In case any fine silt should be forced through the fibrous envelopeafter long use, it would settle in this sediment chamber.

A special merit of this improved filter consists in the readiness withwhich it may be cleaned. To clean it, the cap E is first removed, andthen the tube A, with its fibrous envelope, is unscrewed and whollyremoved from the casing D. The disk C can then be removed and afterwardthe several diskwashers B, which can then be separately cleaned andrestored in position. In the same manner worn-out felt washers can bereplaced by new ones.

The filteris particularly design ed to be used in the supply-pipe of awater-spraying and airmoistening device, such as is shown in LettersPatent of the United States granted to me April 1, 1890, No. 424,652,the application for which was filed November 24, 1888, Serial No.291,749, (of which the present application is a division 5) but anexactly similarconstruction may be employed in any supply-pipe wherethere is sufficient pressure to cause the water to percolate through thefelt envelope.

It is evident that, instead of annular felt disks superimposed one uponthe other, the

fibrous envelope of the perforated tubes may be composed of a number offelt tubes or mufis, or these latter may be employed in connection withthe felt washers.

I claim as my invention A filter having a casing D, awater-inlet F, anda vertical discharge-tube H, extending within the casing, in combinationwith a perforated pipe A, which slips over said tube I-I, whereby asediment-chamber is' forme'd between said tubes, and an envelope offibrous 'Inaterial surrounding said perforated tube,

substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses. y V

. EMILE MERTZ.

Witnesses:

GEORGE GIFFORD, CHAs. A. RICHTER.

